Imports golang.org/x/net/context golang.org/x/net/context/ctxhttp gopkg.in/olivere/elastic.v5/uritemplates gopkg.in/olivere/elastic.v5/backoff Standard library imports bytes encoding/json errors fmt io io/ioutil math/rand net/http net/url reflect regexp runtime strconv strings sync sync/atomic time net/http/httputil compress/gzip